This is a ZnSe-W-13x2 13 mm Dia. ZnSe Flat Window with a thickness of 2mm, uncoated and sourced from Alkor Technologies. The window is a flat, circular shape with a diameter of 13mm, designed for use in optical systems.
The material of the window is ZnSe, which is known for its excellent transmission properties in the infrared region, making it suitable for applications in the 10600nm wavelength range. The window is uncoated, meaning it does not have any additional layers applied to modify its optical properties.
The window is shaped as a thin lens, which can be beneficial in certain optical system designs. The lack of a coating means that the window will not introduce any coating-related artifacts into the system, but it may be more susceptible to environmental conditions such as dust and moisture.
For more information about this product, including pricing and availability, please refer to the vendor's website at http://www.alkor.net/ZnSe_windows.html.